You can get a great benchmark comparison between different operating system with same hardware specifications, and able to make side by side comparisons. Phoronix working on many platforms ” Linux, Mac OS X, windows 7, BSD, Open Solaris ”

System logs able to achieve system log such as “Xorg.0.log, Ispci, dmesg,… ”

For more information about The Phoronix Test Suite Follow this link , and this application available on ubuntu software center and you can download it from here also for different distributions.